package com.bzxhh.lock;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

//1.创建资源类
class ShareResource {
    //定义标志位
    private int flag = 1; //1 t1;2 t2;3 t3;

    //创建Lock
    private Lock lock = new ReentrantLock();

    //创建三个condition
    private Condition c1 = lock.newCondition();
    private Condition c2 = lock.newCondition();
    private Condition c3 = lock.newCondition();

    //打印5次 参数第几轮
    public void print5(int loop) throws InterruptedException {
        //上锁
        lock.lock();
        try {
            //判断
            while (flag != 1) {
                //等待
                c1.await();
            }
            //干活
            for (int i = 0; i < 5; i++) {
                System.out.println(Thread.currentThread().getName() + "::" + i + " ,轮数：" + loop);
            }
            //通知
            flag = 2; //修改标志位
            c2.signalAll(); //通知t2线程
        } finally {
            //释放锁
            lock.unlock();
        }
    }

    //打印10次 参数第几轮
    public void print10(int loop) throws InterruptedException {
        lock.lock();
        try {
            while (flag != 2) {
                c2.await();
            }
            for (int i = 0; i < 10; i++) {
                System.out.println(Thread.currentThread().getName() + "::" + i + " ,轮数：" + loop);
            }
            flag = 3;
            c3.signal();
        } finally {
            lock.unlock();
        }
    }

    //打印15次 参数第几轮
    public void print15(int loop) throws InterruptedException {
        lock.lock();
        try {
            while (flag != 3) {
                c3.await();
            }
            for (int i = 0; i < 15; i++) {
                System.out.println(Thread.currentThread().getName() + "::" + i + " ,轮数：" + loop);
            }
            flag = 1;
            c1.signal();
        } finally {
            lock.unlock();
        }
    }
}

public class ThreadDemo3 {

    public static void main(String[] args) {
        ShareResource shareResource = new ShareResource();

        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                try {
                    shareResource.print5(i);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
        }, "t1").start();

        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                try {
                    shareResource.print10(i);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
        }, "t2").start();

        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                try {
                    shareResource.print15(i);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
        }, "t3").start();
    }
}
